While doing some research I came across Israel and his wife, Eva's death details. It also lists family members and new/different surname.

We have Israel Schwartz -
May 21 1937 - The tombstone in memory of the late Israel Schwartz will be consecrated at Edmonton Cemetery on Sunday May 23rd at 1pm. Conveyance
leaves 26 Princes Square, Cable Street E1 at 12:15pm.

We know that in the 1911 census Israel was living at 26 Princes Square so nice link there.

It's interesting to note here that Lionel was called Shorts and was a furrier when they also had a son called Lionel who worked with fur. All comes together nicely with the last piece of info

Shorts (Schwartz) - went to sleep on Thursday June 29 1944. Eva, beloved wife of the late Israel Schwartz of Princes Square E.1. Deeply mourned by her sorrowing children Elllie (Mrs Shear), Lionel, Daniel, Judah, Alf and Monte and in law Joe; daughters in law Frances, Fanny and Hettie; grandchildren and g grandchildren. Shiva at 20 Fairholt Road .

This does lead us to Lionel Shorts info but as that's going into the 1960's i'd rather not post that info. There doesn't seem anything pertinent to Israel that I can see anyway.
I will say he does leave a will in which he names a Judah Shorts as one of the recipients , so either he has a son named after his brother or his brother Judah also changed his last name.

His marriage in 1914 shows he's using the name Schwartz still.

Tj

__________________It's not about what you know....it's about what you can find out

SCHWARTZ (Shorts). — On Friday/ the
24th of April (Iyar 2nd), Israel
Schwartz, of 26,. Princes-square, E.I,
after a prolonged illness. Deeply
mourned by his beloved wife Eva, and
children Ettie, Lionel, Daniel, Judah,
Alfred, Monty, sorrowing son-in-law,
daughters-in-law and grandchildren.
- Cherished memories of a noble and
righteous Jew.

also his marriage of Esther to Joe Shear -

SCHWARTZ : SHEAR.—On Sunday, the
18th of August, at the Bethnal Green Synagogue,
by the Rev. 8. Blachman, Esther, I
eldest daughter of Mr. and Mrs. I. Schwartz, |
of 26, Princes-square, Cable-street, to Joe,
son of Mr. and Mrs. Shear, of 51, Buxton St East.

tj

__________________It's not about what you know....it's about what you can find out